What is the regular expression to match a digit (0-9) in a string?
Answer options
A
\d
B
[0-9]
C
\D
D
[^0-9]
Correct answer: \d
Explanation
\d matches any digit character (0–9) in Java regex.
Correct answer: \d
\d matches any digit character (0–9) in Java regex.
PrimerDumps has 1400+ primer questions, 2026 mocks and coding hands-on — all free.